摘要:
A semiconductor device includes a semiconductor substrate having a resistor region, an isolation layer disposed in the resistor region, the isolation layer defining active regions, first conductive layer patterns disposed on the active regions, a second conductive layer pattern covering the first conductive layer patterns and disposed on the isolation layer, the second conductive layer pattern and the first conductive layer patterns constituting a load resistor pattern, an upper insulating layer disposed over the load resistor pattern, and resistor contact plugs disposed over the active regions, the resistor contact plugs penetrating the upper insulating layer to contact the load resistor pattern.
摘要:
A semiconductor device includes a semiconductor substrate having a resistor region, an isolation layer disposed in the resistor region, the isolation layer defining active regions, first conductive layer patterns disposed on the active regions, a second conductive layer pattern covering the first conductive layer patterns and disposed on the isolation layer, the second conductive layer pattern and the first conductive layer patterns constituting a load resistor pattern, an upper insulating layer disposed over the load resistor pattern, and resistor contact plugs disposed over the active regions, the resistor contact plugs penetrating the upper insulating layer to contact the load resistor pattern.
摘要:
A semiconductor device includes a semiconductor substrate having a resistor region, an isolation layer disposed in the resistor region, the isolation layer defining active regions, first conductive layer patterns disposed on the active regions, a second conductive layer pattern covering the first conductive layer patterns and disposed on the isolation layer, the second conductive layer pattern and the first conductive layer patterns constituting a load resistor pattern, an upper insulating layer disposed over the load resistor pattern, and resistor contact plugs disposed over the active regions, the resistor contact plugs penetrating the upper insulating layer to contact the load resistor pattern.
摘要:
An apparatus for detecting a packet end point in a wireless communication system includes: a signal reception unit configured to receive a signal from an outside, convert the signal into a baseband signal, perform analog-digital conversion of the baseband signal, and perform a digital front end; a storage unit configured to store an output of the signal reception unit; a frequency offset estimation unit configured to estimate a frequency offset using the output of the storage unit; a frequency offset correction unit configured to compensate for a frequency error using the estimated frequency offset; an offset correlation unit configured to calculate correlation of the frequency offset and a cyclic prefix; an auto-correlation operation unit configured to calculate auto-correlation of the cyclic prefix; and a packet end detection unit configured to check a packet end point using the auto-correlation.
摘要:
An error tracking apparatus and method for tracking a residual frequency error, a phase error, a timing error, and a signal amplitude variation to enhance a phase error tracking performance and a tracking speed in an orthogonal frequency division multiplexing (OFDM) system is provided. The error tracking apparatus and method include: a frequency error corrector for correcting a frequency at a time domain by adding a tracking carrier error estimating value to an initial carrier frequency error estimating value; a signal amplitude tracking corrector for controlling a signal amplitude by multiplying an input signal converted by a fast Fourier transform (FFT) by an output value corresponding to a calculated power of a receive pilot signal; a channel corrector for outputting a channel correcting signal by multiplying the receive pilot signal by a complex conjugate of a frequency channel response of the receive pilot signal; a carrier frequency error estimator for estimating a carrier frequency error parameter using the channel-corrected pilot and providing the tracking carrier frequency error estimating value; a time offset estimator for estimating a time offset parameter using the channel-corrected pilot; and a carrier phase error estimator for estimating a carrier phase error parameter using the channel-corrected pilot.
摘要:
The present invention relates to a transmitting apparatus of a wireless communication system, and a method thereof. The transmitting apparatus monitors receiving of response data for data that has been transmitted to a receiving end, and sets a first parameter for counting successful receipts according to receiving on the response data. The transmitting apparatus demodulates the response data and extracts the number of demodulated data that satisfies a first set value. Subsequently, it is determined whether the first parameter satisfies a second set value and the number of demodulated data satisfies a predetermined ratio of a referential amount of packets. According to the present invention, an efficient transmission mode for a channel state can be provided with reference to an extracted number of soft-decision data from response data received at a receiving end. In addition, a transmission mode can be determined by using only response data according to the present invention.
摘要:
The present invention relates to an orthogonal frequency division multiplexing wireless local area network (LAN) transmitting/receiving system for providing expanded service coverage, and a method thereof. According to the present invention, first OFDM modulation is performed for an even-numbered time, and second OFDM modulation is performed by changing subcarrier allocation positions of first OFDM modulated symbols for an odd-numbered time. In addition, a transmitting frame including a plurality of signal fields according to the first and second OFDM modulation is transmitted. The receiving system determines a format configuration of the received frame to determine whether a signal field is repeatedly generated in the frame. When it is determined that the signal field is not repeatedly generated, corresponding demodulation is performed. When it is determined that the signal field is repeatedly performed, the signal field is demodulated by using first bit allocation information and is demodulated by using second bit allocation information having a 1/2 value of the first bit allocation information. A data field is demodulated according to the demodulated signal field.
摘要:
The apparatus includes a radio frequency (RF) unit configured to arrange a plurality of symbols received through an antenna at a frequency domain, an analog to digital (AD) converter configured to converts the plurality of symbols arranged at the frequency domain to digital symbols, a fast Fourier transform (FFT) unit configured to transform the digital symbols through a fast Fourier transform scheme, a compensator configured to compensate a gain mismatch between an I-channel and a Q-channel of the transformed digital symbols, a mapping unit configured to the compensated digital symbols to a constellation diagram, and a detector configured to correlate the mapped symbols, extract correlation results, and detect a high throughput (HT) signal using the extracted correlation results.
摘要:
The present invention relates to a CD43 epitope expressed on human acute leukemia and lymphoblastic lymphoma cells and its use. More particularly, the present invention relates to a CD43 epitope expressed on human acute leukemia, lymphoblastic lymphoma cells, but not on mature hematopoietic cells, hematopoietic stem cells and non-hematopoietic cells, and to its diagnostic and therapeutic application on acute leukemia and lymphoblastic lymphoma.
摘要:
The present invention relates to a decoding device and method for a MIMO system. A linear process is applied to a received signal vector by using a channel matrix estimated from the received signal vector and a poly-diagonalized matrix, and a soft decision value is acquired through a trellis decode by using the linear process result. Since the linear preprocess is performed by using the poly-diagonalized matrix, it is possible to receive a MIMO signal having good packet error rate performance and less complexity. Also, since the tail-biting trellis decoding method is used based on the poly-diagonalized matrix that is generated by poly-diagonalizing the effective channel matrix during the process for eliminating the signal interference, the soft decision value for the symbol can be generated with a simple hardwired device and less operation complexity.